JVM の仕組みを理解して PHP で実装してみよう

Nextbeat Tech Bar： Java/JVM祭り

Transcript

1. Ί΋Γʔ +7.
   ͷ࢓૊ΈΛཧղͯ͠
   1)1
   Ͱ࣮૷ͯ͠ΈΑ͏ /FYUCFBU
   5FDI
   #BSɿ
   +BWB+7.ࡇΓ 1
2. Ί΋Γʔ NNS ෳ਺ͷϕϯνϟʔاۀ΍ελʔτ Ξοϓاۀɼ্৔اۀͰιϑτ΢Σ ΞΤϯδχΞ΍
   $50
   ͱͯ͠׆ಈɻ
   ීஈ͸
   3VCZ
   ͱ
   5ZQF4DSJQU
   ॻ͍ͯ ·͢ɻ 2 NNS NNS
3. 3 NEW!
4. 1)1
   Ͱ
   +7.
   ͷ࣮૷ !1)1FS,BJHJ
    4 1)1
   Ͱ
   3VCZ7.
   ͷ࣮૷ !3VCZ,BJHJ
    աڈͷ࡞඼ʜ
5. 7.
   ʢ7JSUVBM
   .BDIJOFʣͷ࢓૊Έ +7.
   ͷ࣮૷ํ๏ 1)1
   Ͱͷ࣮૷ํ๏ %&.0 5 ͋͐͡Μͩ
6. ஫ҙࣄ߲ 6
7. ࣮૷ͷ͠΍͢͞ͷ؍఺Ͱ
   +%,
   
   Λڭࡐͱ͠·͢ ίϯύΠϥʹ͍ͭͯ͸࿩͠·ͤΜ 1)1
   +BWB
   ͷॻ͖ํʹ͍ͭͯ͸࿩͠·ͤΜ +7.
   4QFDJ fi DBUJPO
   ͷৄ͍͠ಡΈํʹ͍ͭͯ͸ 7 ஫ҙࣄ߲ ࿩͠·ͤΜ
8. 8 ϦϙδτϦͷ͝঺հ IUUQTHJUIVCDPNQIQKBWBQIQKBWB
9. ଟ͘ͷਓ͕֤ʑͷ޷͖ͳݴޠͰ
   +7.
   Λ࣮૷͢Δ͜ͱ͕ྲྀߦΓ·ͨ͠Ͷ
   ʢ
   ೥લʣ 9
10. ࠓ͸
    --.
    ΋͋Γɼੲ΄Ͳ࣮૷ʹ
    ۤ৺͠ͳ͍ͩΖ͏ͱࢥ͍·͢ɻ
    
    ϓϩάϥϛϯάॳ৺ऀͷํ΋௅ઓ͕Ͱ͖Δ
    ͱͯ΋ྑ͍࣌୅͕౸དྷ͖ͯ͠·ͨ͠ɻ 10
11. ͷͰͥͻ௅ઓͯ͠ΈͯͶʂ 11
12. 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ 12
13.  +7.
    Λ࣮૷͢Δʹ͋ͨͬͯ
    7.
    ͷཧղ͸ඇৗʹॏཁͰ͢ɻ
     7.
    ͸
    7JSUVBM
    .BDIJOF
    ͱ͍͍ɼͦͷίϯϐϡʔλͷಈ࡞Λιϑτ΢ΣΞ্Ͱ࠶ݱ ͢Δ΋ͷͰ͢ɻ
     ྫ͑͹
    7JSUVBM
    #PY
    ͳͲ͕Πϝʔδʹ͍ۙΜ͡Όͳ͍Ͱ͠ΐ͏͔ɻ
     ͨͩɼ͜ΕΒͷ΄ͱΜͲ͸ɼ+7.
    ͷΑ͏ͳ
    7.
    ͱ͸গ͠ҟͳΓ·͢ɻ 13 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ
14.  ҰํͰɼ+7.
    ʢ+BWB
    7JSUVBM
    .BDIJOFʣ΍
    ;FOE
    7.
    1)1
    ༻ͷ
    7JSUVBM
    .BDIJOF ɼ 3VCZ
    7.
    ͳͲ͸શ͘ҟͳΓ·͢ɻ
     ઌ΄Ͳͷྫ͸ϋʔυ΢ΣΞϨϕϧͷ΋ͷͰ͕͢ɼ͜ΕΒ͸ΞϓϦέʔγϣϯϨϕϧ ͷ΋ͷͰ͢ɻ
     7.
    ͱॻ͍͍ͯͯ΋ɼ͍͔ͭ͘छྨ͕͋ΔΜͩɼͱ͓΅͓͖͑ͯ·͠ΐ͏ɻ
     ࣍ʹྫͷਤΛࣔ͠·͢ɻ 14 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ
15. 15 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ macOS VirtualBox (VM) JVM Java ϓϩάϥϜ JVM Java ϓϩάϥϜ Zend VM PHPϓϩάϥϜ
16.  ͦͯ͠ɼ΄ͱΜͲͷΞϓϦέʔγϣϯϨϕϧͷ
    7.
    ͸ελοΫϚγϯʹ͍͔ۙͨͪͰ ࣮ͯ͠૷͞Ε͍ͯ·͢ʢ%BMWJL
    ͳͲ͸আ͘ʣɻ
     ΋ͪΖΜ
    +7.
    ΋
    3VCZ7.
    ΋ελοΫϚγϯͷΑ͏ͳܗͰɼ$16
    ͷ΄ͱΜͲ ʢY
    ͸ʣ͸ϨδελϚγϯͰ͢ɻ
     ελοΫϚγϯͱ͸ɼࢦఆ͞Ε͍͔ͨͭ͘ͷϨδελ্ʹԿ͔Λ֨ೲ͢ΔͷͰ͸ͳ ͘ɼσʔλΛελοΫʢੵΈ্͛ʣͳ͕Βɼॲཧ͍ͯ͘͠ํ๏Ͱ͢ɻ
     ҰํϨδελϚγϯ͸ɼ͋Β͔͡ΊܾΊΒΕͨϨδελͱݺ͹ΕΔྖҬʹ஋Λ֨ೲ ͯ͠ܭࢉΛߦ͍ͬͯ͘΋ͷͰ͢ɻ 16 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ
17.  ϨδελϚγϯͷݩΛ֞ؒݟ͍ͨͷͰ͋Ε͹ɼΞηϯϒϦݴޠΛॻ͍ͯɼ֤
    $16
    ʹ ࠷దԽ͞ΕͨܗͰτϥϯεύΠϧ͢Ε͹ɼ͋Δఔ౓ཧղͰ͖ΔΜ͡Όͳ͍͔ͳͱࢥ͍ ·͢ɻ
     ༨ஊͰ͕͢ɼελοΫϚγϯ͸Ұ෦ͷϨδελϚγϯͷ࢓૊ΈΛऔΓೖΕ͍ͯΔ͜ͱ ΋͋Γ·͢ɻ 17 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ
18. ελοΫϚγϯ
    ʙ
    
    
    
    
    Λٙࣅ໋ྩηοτͰܭࢉ͢Δʙ 18
19. 
    
    
    
    
    Λٙࣅ໋ྩηοτͰܭࢉ͢Δ 19 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output - constadd ໋ྩ͸ 1 ͭͷΦϖϥϯυΛऔΓɼͦΕΛελοΫ ʹϓογϡ͢Δ໋ྩ - plus ͸ελοΫ͔Β 2 ͭ஋Λϙοϓ͠ɼͦΕΛՃࢉͨ͠΋ͷ ΛελοΫʹϓογϡ͢Δ໋ྩ - output ͸ελοΫ͔ΒҰͭϙοϓ͠ग़ྗ͢Δ໋ྩ - ্هͷ 3 ͭͷ໋ྩͰ࣮ݱՄೳͰ͢ɻ͜ͷҰ࿈ͷྲྀΕΛ໋ྩ γʔέϯεͱݴͬͨΓ͠·͢ɻ
20. 
    
    
    
    
    Λٙࣅ໋ྩηοτͰܭࢉ͢Δ 20 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 1 ελοΫʹ 1 Λϓογϡ
21. 
    
    
    
    
    Λٙࣅ໋ྩηοτͰܭࢉ͢Δ 21 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 1 ελοΫʹ 2 Λϓογϡ 2
22. 
    
    
    
    
    Λٙࣅ໋ྩηοτͰܭࢉ͢Δ 22 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 1 2 ͭͷσʔλΛϙοϓ 2 3 Ճࢉͨ݁͠ՌΛϓογϡ
23. 
    
    
    
    
    Λٙࣅ໋ྩηοτͰܭࢉ͢Δ 23 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 3 ελοΫʹ 3 Λϓογϡ 3
24. 
    
    
    
    
    Λٙࣅ໋ྩηοτͰܭࢉ͢Δ 24 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 3 2 ͭͷσʔλΛϙοϓ 3 6 Ճࢉͨ݁͠ՌΛϓογϡ
25. 
    
    
    
    
    Λٙࣅ໋ྩηοτͰܭࢉ͢Δ 25 7.
    7JSUVBM
    .BDIJOF
    ʹ͍ͭͯ constadd (operand: 1) constadd (operand: 2) constadd (operand: 3) plus plus output ελοΫ 6 1 ͭͷσʔλΛϙοϓ
26. ϨδελϚγϯͷ࢓૊Έ͸
    
    $16
    ʹΑͬͯҟͳΔͷͰׂѪ͠·͢ 26
27. +7.
    ͷ࣮૷ํ๏ 27
28.  7.
    ͷ࣮૷ํ๏͕֓ͶΘ͔Γ·ͨ͠ͶɻͰ͸ɼ࣮ࡍʹ
    +7.
    ͷ࣮૷ํ๏ʹ͍ͭͯཧղ ΛਂΊ͍͖ͯ·͠ΐ͏ɻ
     +7.
    ͸
    DMBTT
    ϑΝΠϧͱݺ͹ΕΔσʔλߏ଄ͷू߹Λ໋ྩͱղऍͯ͠ಈ࡞ͤ͞ΔΞ ϓϦέʔγϣϯϨϕϧͷ
    7.
    Ͱ͢ɻ
     DMBTT
    ϑΝΠϧ͸ɼ+7.
    ͷن໿ʹଇΓɼҰൠతʹ͸
    +BWB
    ϓϩάϥϜ͔ΒίϯύΠϧ ͞Ε·͢ɻ
     ͋Δ͍͸ɼ,PUMJO
    4DBMB
    ͷΑ͏ͳ
    +7.
    ݴޠͱݺ͹ΕΔϓϩάϥϜ΍ɼ΋ͪΖΜ
    ίϯύΠϥΛࣗ࡞ͯ͠
    +7.
    ݴޠͱ͢Ε͹ɼࣗ෼ࣗ਎ͷ޷͖ͳ΋ͷ΋ؚΈ·͢ɻ 28 +7.
    ͷ࣮૷ํ๏
29.  ͦͯ͠ɼ͜ΕΒ͸
    +7.
    4QFD
    5IF +BWBš
    7JSUVBM
    .BDIJOF
    4QFDJ fi DBUJPO
    ͱݺ͹ΕΔɼυΩϡϝϯτ͕ΦϯϥΠϯͰެ։͞Ε͓ͯΓɼ+7.
    Λࣗ࡞͢ΔڭՊॻͱ΋ͳΓ·͢ɻ
     +%,
    
    ͔Βɼจࣈྻॲཧͷ࠷దԽͳͲ͕͋Γ࣮૷͕൥ࡶʹͳΔͨΊɼखܰʹ΍Δ ͨΊʹ͸
    +%,
    
    Λਪ঑͠·͢ɻ
     +%,
    
    ͕͍͍ײ͡ʹಈ͍ͨΒɼ+%,
    
    ͳͲʹγϑτ͍ͯ͘͜͠ͱΛ͓͢͢Ί͠ ·͢ɻ
     υΩϡϝϯτ͸ͪ͜Β
    IUUQTEPDTPSBDMFDPNKBWBTFTQFDTKWNTTFIUNM 29 +7.
    ͷ࣮૷ํ๏
30. ͱ͸͍͑ʜ 30
31.  ௚ۙͰ͸
    --.
    ΋ൃల͖͍ͯͯ͠ΔͷͰɼ$IBU(15ɼ$MBVEFɼ(FNJOJ
    ͳͲΛύʔτ φʔͱͯ͠ɼ࣮૷͢Δ΋શવ͋ΓͰ͢ɻ
     ྫ͑͹ɼDMBTT
    ϑΝΠϧͷࠜఈͷσʔλߏ଄͸
    $MBTT'JMF
    4USVDUVSF
    ͱݺ͹ΕΔ΋ͷ Ͱ͕͢ɼ$IBU(15
    P
    Ͱ΋ద੾ͳճ౴Λग़ͯ͘͠Ε·͢ɻ 31 +7.
    ͷ࣮૷ํ๏
32. 32 +7.
    ͷ࣮૷ํ๏ +7.
    4QFD
    Λ௚઀ಡΜͰ͍͘৔߹
    IUUQTEPDTPSBDMFDPNKBWBTFTQFDTKWNTTFIUNM KWNTIUNMKWNT
    $IBU(15
    ͱҰॹʹ࡞͍ͬͯ͘
33. ͦͯ͠
    $IBU(15
    ͱ͍ͬ͠ΐʹ
    ࡞͍ͬͯ͘৔߹͸ྫ΋ࣔͯ͘͠Ε·͢ 33
34. 34 +7.
    ͷ࣮૷ํ๏ $IBU(15
    ͱҰॹʹ࡞͍ͬͯ͘ͱʜ
35.  $MBTT'JMF
    4USVDUVSF
    ͸
    DMBTT
    ϑΝΠϧͷߏ଄Λఆٛ͢Δॏཁͳσʔλߏ଄Ͱ͢ɻ
    㙽ʹ΋֯ʹ΋͜ͷ࢓૊ΈΛ஌Βͳ͚Ε͹ɼଞݴޠͰ࣮૷Ͱ͖·ͤΜɻ
     ຊࢿྉΛࢀߟʹ࣮૷தʹ͍᪴ͨ৔߹͸ɼͥͻ
    --.
    ʹฉ͖ͳ͕Β΍ͬͯ΋Β͑Δͱ εϜʔζ͔ͳͱࢥ͍·͢ɻ
     Ͱ͸ɼ$MBTT'JMF
    4USVDUVSF
    ΛಡΈࠐΉ࢓૊Έ
    1)1
    Ͱ࣮૷ͭͭ͠ɼࠓճ͸
    
    )FMMP
    8PSME
    ͷग़ྗΛΰʔϧͱ࣮ͯ͠૷·Ͱ΍ͬͯΈ·͠ΐ͏ɻ
     )FMMP
    8PSME
    ͷग़ྗͰ͋Ε͹ɼ+7.
    4QFD
    ʹهࡌ͞Ε͍ͯΔ಺༰͢΂ͯΛɼ
    ద੾ʹཧղ࣮ͯ͠૷͢Δඞཁ΋ͳ͍ͷͰɼָ࣮͘͠૷Ͱ͖Δ͜ͱؒҧ͍ͳ͠Ͱ͢ɻ 35 +7.
    ͷ࣮૷ํ๏
36. 1)1
    Ͱͷ࣮૷ํ๏ 36
37. 1)1
    ͰόΠφϦΛಡΉʹ͸ʜʁ 37
38.  1)1
    ʹ΋όΠφϦΛಡΈࠐΉํ๏͕ఏ ڙ͞Ε͍ͯ·͢ɻ͜͏͍ͬͨέʔεͰ ͸
    GPQFO
    GSFBE
    VOQBDL
    ͳͲ͕ ศརͰ͢ɻ
     DMBTT
    ϑΝΠϧ͸σʔλߏ଄ͱ͸͍͑ɼ +40/
    ͷΑ͏ʹϚγϯϦʔμϒϧͰ΋ ώϡʔϚϯϦʔμϒϧͰ΋ͳ͘ɼόΠ φϦͰ͢ɻ 38 1)1
    ͰόΠφϦΛಡΉʹ͸ʜʁ
39. όΠφϦΛಡΈࠐΜͰ͍͘ྲྀΕ 39
40. 40 όΠφϦΛಡΈࠐΜͰ͍͘ྲྀΕ ClassFile Structure ΛಡΈࠐΉ Constant Pool ΛಡΈࠐΉ ϝιουͷ৘ใΛಡΈࠐΉ Code Attribute ΛಡΈࠐΉ ΦϖίʔυΛ࣮ߦ͢Δ ΦϖίʔυʢϓϩάϥϜʣΛ࣮ߦ͢ΔͨΊͷ
 લॲཧ
41. $MBTT'JMF
    4USVDUVSF 41
42.  $MBTT'JMF
    4USVDUVSF
    ͸
    DMBTT
    ϑΝΠϧ ͷϝλ৘ใͳͲ͕֨ೲ͞Ε͍ͯΔσʔλ ߏ଄Ͱ͢ɻ
     ྫ͑͹ɼίϯύΠϧ࣌ʹ༻͍ΒΕͨ
    +BWB
    ͷόʔδϣϯɼ͜ͷ͋ͱղઆ͢ Δ
    +7.
    
    Λ࣮૷͢ΔࡍͷίΞͱͳΔ
    $POTUBOU
    1PPMɼϑΟʔϧυͷ৘ใɼ ϝιουͷ৘ใͳͲͰ͢ɻ 42 $MBTT'JMF
    4USVDUVSF
43. 43 $MBTT'JMF
    4USVDUVSF  $MBTT'JMF
    4USVDUVSF
    ͸
    DMBTT
    ϑΝΠϧ ͷϝλ৘ใͳͲ͕֨ೲ͞Ε͍ͯΔσʔλ ߏ଄Ͱ͢ɻ
     ྫ͑͹ɼίϯύΠϧ࣌ʹ༻͍ΒΕͨ
    +BWB
    ͷόʔδϣϯɼ͜ͷ͋ͱղઆ͢ Δ
    +7.
    
    Λ࣮૷͢ΔࡍͷίΞͱͳΔ
    $POTUBOU
    1PPMɼϑΟʔϧυͷ৘ใɼ ϝιουͷ৘ใͳͲͰ͢ɻ
44. $POTUBOU
    1PPM 44
45. 45 $POTUBOU
    1PPM  $POTUBOU
    1PPM
    ͸
    $MBTT'JMF
    4USVDUVSF
    ͷσʔλߏ଄ͷҰ෦Ͱ
    +7.
    ʹͱͬͯಛʹίΞͱͳΔσʔλߏ଄ Ͱ͢ɻ
     ੔਺ɼจࣈྻɼϝιου໊ʢҾ਺ؚ ΉʣͳͲͷσʔλ͕֨ೲ͞Ε͍ͯ·͢ɻ
     ͜ΕΒΛऔΓग़͢͜ͱʹΑͬͯ
    )FMMP
    8PSME
    
    Λग़ྗ͢Δ͜ͱ͕Ͱ͖ΔΑ͏ ʹͳΓ·͢ɻ
46. ϝιου 46
47. 47 ϝιου  ϝιου͸ɼ$MBTT'JMF
    4USVDUVSF
    ͷ σʔλߏ଄ͷҰ෦ͰɼΞΫηεम০ࢠ ΍ɼҾ਺ͷ৘ใΛɼͲͷ
    $POTUBOU
    1PPM
    ͔Βࢀর͢Δ͔Λ͍ࣔͯ͠Δ΋ͷ Ͱ͢ɻ
     ͜ΕΛಡΈࠐΉ͜ͱͰɼ)FMMP
    8PSME
    ͷग़ྗ͕࣮૷͞Ε͍ͯΔ
    QVCMJD
    TUBUJD
    NBJO 4USJOH<>
    BSHT
    ͷ৘ใ͕औಘͰ͖·͢ɻ
48. $PEF
    "UUSJCVUF 48
49.  $PEF
    "UUSJCVUF
    ͸
    $MBTT'JMF
    4USVDUVSF
    Ͱఆٛ͞Ε͍ͯΔͷϝιουͷσʔλߏ଄ͷ Ұ෦Ͱ͢ɻ
     ϝιουʹଐੑͱͯ͠ϓϩάϥϜͷ৘ใ͕ ෇ਵ͍ͯ͠·͢ɻ
     $MBTT'JMF
    4USVDUVSF
    ࣗମͷ
    "UUSJCVUF
    ͱ ͯ͠ɼίʔυͷߦ਺Λ֨ೲ͍ͯ͠Δଐੑͷ ৘ใͳͲ͕͋Γ·͢ɻ 49 $PEF
    "UUSJCVUF
50. Φϖίʔυͷ࣮ߦ 50
51.  Φϖίʔυʢ0Q$PEF
    0QFSBUJPO
    $PEFʣ͸ɼ໋ྩΛ୹͘ϚγϯϦʔμϒϧʹදݱ͠ ͍ͯΔ΋ͷͰ͢ɻ·ͨҾ਺ͷ͜ͱΛΦϖϥϯυͱ͍͍·͢ɻ
     $PEF
    "UUSJCVUF
    ΛಡΈࠐΉ͜ͱͰɼ͜ͷ໋ྩΛऔಘͰ͖·͢ɻ 51 Φϖίʔυͷ࣮ߦ B2 00 02 12 03 B6 00 04 B1 getstatic ͷΦϖίʔυ getstatic ͷΦϖϥϯυ (Constant Pool ͷ2 ൪໨)
52.  ώϡʔϚϯϦʔμϒϧͰ͸ͳ͍ͷͰɼཧղ ͕೉͍͠Ͱ͕͢ɼ͜ΕΒΛώϡʔϚϯϦʔ μϒϧʹͨ͠΋ͷ͕͋ΓɼͦΕΒΛχʔϞ χοΫʢNOFNPOJDʣͱݺΜͩΓ͠· ͢ɻ
     ΞηϯϒϦݴޠΛॻ͍ͨ͜ͱ͕͋Δਓ ͸ɼͳΜͱͳ͘Πϝʔδ͔ͭ͘ͳͱࢥ͍ ·͢ɻ
     +BWB
    ͸
    KBWBQ
    D
    ίϚϯυͰɼͲ͏͍͏ ίʔυ͔೷͚·͢ɻ 52 Φϖίʔυͷ࣮ߦ
53. ͜ͷ
    KBWBQ
    ίϚϯυͱ
    ಉ͡ΦϖίʔυΛ࣮૷͢Ε͹Α͍Ͱ͢ 53
55. KBWB-BOH4ZTUFN
    ͸
    1)1
    ͷ
    OBNFTQBDF
    Λ͏·͘׆༻ͯ͠ʜ 55
57. %&.0 57 IUUQTHJTUHJUIVCDPNNNSEEDFBGFDFFBGCFDBBF
58. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ 58